Power tool having improved motor fan assembly
US9923429B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Sep 14, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor includes a stator, a shaft rotatable with respect to the stator, and a lamination stack mounted on the shaft and having radially extending teeth forming slots therebetween. An end insulator is provided at an end of the lamination stack having forming slots therebetween. Motor coils are wound in the lamination stack slots and the end insulator slots. A fan having blades attached to a fan ring and mounted to an end of the lamination stack. The fan ring includes longitudinally-extending tongues arranged to be mounted at the end of the lamination stack and the end insulator includes longitudinally-extending notches corresponding to the tongues of the fan ring to allow the tongues to be in direct contact with the end of the lamination stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.